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公开(公告)号：US4448169A
公开(公告)日：1984-05-15
申请号：US221764
申请日：1980-12-31
CPC分类号： F02M59/02 , F02M57/025 , F02M59/105 , F02B3/06
摘要： An injector for a diesel engine is provided which includes a housing having an internal bore, and a reciprocating plunger disposed within the bore and coacting therewith to pump fuel, dampen plunger movement, and quickly vent fuel pressure to provide a sharp end of injection. The bore is generally coextensive with the housing and a spray tip is attached to the end of the bore to introduce fuel into a combustion chamber. The plunger forms a chamber at the end of the bore that expands to admit fuel and contracts to express fuel as the plunger reciprocates within the bore. The chamber has an upper portion that pumps fuel and a lower sealable portion that entraps fuel to dampen plunger movement. The plunger and bore also form a reciprocating spill valve above the chamber to vent fuel pressure. An internal inlet passage supplies fuel to the pumping chamber portion. An internal spray passage connects the pumping chamber portion to the spray tip. The spill valve communicates with the chamber. An internal relief passage connects the spill valve to an exit port.
摘要翻译： 提供了一种用于柴油发动机的喷射器，其包括具有内孔的壳体和设置在孔内并与其共同作用以泵送燃料，阻尼柱塞运动并且快速排出燃料压力以提供尖锐喷射端的往复式柱塞。 孔通常与壳体共同延伸，并且喷嘴附接到孔的端部以将燃料引入燃烧室。 柱塞在孔的端部处形成腔室，该腔室在孔中往复运动时扩张以允许燃料并收缩以表达燃料。 该腔室具有泵送燃料的上部部分和一个下部可密封部分，该部分包围燃料以阻尼柱塞运动。 柱塞和孔也在室上方形成往复式溢流阀以排出燃料压力。 内部入口通道将燃料供应到泵送室部分。 内部喷射通道将泵送室部分连接到喷雾尖端。 溢流阀与腔室连通。 内部释放通道将溢流阀连接到出口。
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公开(公告)号：US4206734A
公开(公告)日：1980-06-10
申请号：US864813
申请日：1977-12-27
申请人： Julius P. Perr , Andrew C. Rosselli
发明人： Julius P. Perr , Andrew C. Rosselli
CPC分类号： F02M57/021 , F02D1/16 , F02M39/02
摘要： This disclosure deals with apparatus for adjusting the timing of injection in an internal combustion engine wherein the fuel system includes unit injectors. The injector for each combustion chamber of the engine is actuated to inject fuel by a cam-follower-linkage mechanism that operates in time relation with the movement of the pistons of the engine. Each such mechanism includes a cam which is rotated in synchronism with the pistons of the engine, a pivotable cam follower which rides on the cam, and a linkage which connects the follower with an injector. The injector includes a plunger which seats on a cup or nozzle to terminate injection. To adjust the timing of injection, the pivot point of the follower and the angular point of engagement of the follower with the cam are moved. The relation of the cam, the follower and the linkage are arranged such that the movement of the linkage does not materially change the effective travel of the plunger as the timing is changed within a broad range. Consequently, the compression load on the plunger and the injector nozzle remains substantially constant at the termination of injection regardless of changes of the timing.
摘要翻译： 本公开涉及用于调节内燃机中的喷射定时的装置，其中燃料系统包括单元喷射器。 发动机的每个燃烧室的喷射器被致动以通过与发动机的活塞的运动时间关系地操作的凸轮从动件联动机构来喷射燃料。 每个这样的机构包括与发动机的活塞同步旋转的凸轮，骑在凸轮上的可枢转凸轮从动件以及将从动件与喷射器连接的联动装置。 喷射器包括一个柱塞，其位于杯子或喷嘴上以终止喷射。 为了调整注射时间，从动件的枢转点和从动件与凸轮的接合角度点移动。 凸轮，从动件和连杆的关系被布置成使得当定时在宽范围内变化时，连杆的运动不会实质上改变柱塞的有效行程。 因此，无论定时的变化如何，在注射终止时，柱塞和喷射器喷嘴上的压缩载荷保持基本恒定。
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3.发明授权
公开(公告)号：US5268842A
公开(公告)日：1993-12-07
申请号：US620782
申请日：1990-12-03
CPC分类号： F02D41/34 , F02D41/2422 , F02D41/2445 , F02B3/06 , F02D41/2416 , Y02T10/44
摘要： A control system for controlling fueling and/or timing of a fuel injector in an internal combustion engine. Fuel injection is controlled based upon the recent operating history of the engine. In particular, the difference between the instantaneous speed and the average speed over a previous predetermined period are compared and the difference is utilized in determining a control variable which in turn can be used for selecting fueling and/or timing values. The difference between the instantaneous fueling and the average fueling over a predetermined period can also be used in selecting the control variable. The fuel injector fueling and/or timing is determined utilizing fueling and/or timing values from at least two maps, with the control variable determining the proportions of the timing/fueling valves to be utilized in determining commanded timing/fueling. The control variable may also be set to a fixed value under certain conditions such as during operation on a governor, or where the operator selects an override function.
摘要翻译： 一种用于控制内燃机中的燃料喷射器的燃料加注和/或定时的控制系统。 基于发动机的最近运行历史来控制燃油喷射。 特别地，比较在先前预定时段内的瞬时速度和平均速度之间的差异，并且将差值用于确定控制变量，而控制变量又可用于选择加油和/或定时值。 在预定时间段内瞬时燃料供给和平均燃料供给之间的差异也可用于选择控制变量。 使用来自至少两个地图的加油和/或定时值确定燃料喷射器加油和/或定时，其中控制变量确定要用于确定所命令的定时/加油的定时/加油阀的比例。 控制变量也可以在某些条件下被设置为固定值，例如在调速器上的操作期间，或者操作者选择超控功能时。
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公开(公告)号：US4393825A
公开(公告)日：1983-07-19
申请号：US221768
申请日：1980-12-31
CPC分类号： F02M63/0215 , F02D17/02
摘要： A system is provided for controlling fuel flow within an internal combustion engine having a plurality of cylinders. The system includes a fuel source; a fuel pump responsive to the engine speed; and a multimode adjustable control valve connected to the fuel pump and a predetermined number of first cylinders. The control valve, when in a first mode, substantially shutting off fuel flow to the first cylinders, except for a minimal amount of fuel leakage from the valve to the first cylinders for lubricating purposes. When in a second mode, the control valve allows substantial fuel flow to the first cylinders. The control valve assumes its first mode when the operating temperature is below a predetermined amount and/or the engine is operating under a predetermined load.
摘要翻译： 提供一种用于控制具有多个气缸的内燃机内的燃料流量的系统。 该系统包括燃料源; 响应于发动机转速的燃料泵; 以及连接到燃料泵和预定数量的第一气缸的多模式可调控制阀。 当处于第一模式时，控制阀基本上关闭到第一气缸的燃料流，除了用于润滑目的从阀到第一气缸的最小量的燃料泄漏。 当处于第二模式时，控制阀允许大量燃料流向第一气缸。 当操作温度低于预定量和/或发动机在预定负载下操作时，控制阀呈现其第一模式。
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